Table 1. The statistic of water, baicalin and API contents in the calibration and validation sets.

Analyte	sample set	sample number	Min(%)	Max(%)	Mean(%)	SD(%)
corn	calibration	53	9.38	10.98	10.22	0.41
	validation	27	9.67	10.99	10.25	0.34
Yinhuang granules	calibration	48	1.61	6.43	3.94	0.02
	validation	24	2.04	6.66	3.60	1.18
pharmaceutical tablets	calibration	155	40.30	63.70	50.78	5.88
	validation	460	41.10	63.30	49.76	4.26
	test	40	50.20	52.40	51.71	0.54